I have an intro to programming lab using python. I want to split a list:
items = ['40/40', '10/40', '30/40', '4/5', '18/40', '40/40', '76/80', '10/10']
into two new lists:
items_1 = ['40','10','30','4','18','40','76','10']
items_2 = ['40','40','40','5','40','40','80','10']
Any help is appreciated.
So here is the standard zip one-liner. It works when items is non-empty.
items = ['40/40', '10/40', '30/40', '4/5', '18/40', '40/40', '76/80', '10/10']
items_1, items_2 = map(list, zip(*(i.split('/') for i in items)))
The map(list(..)) construct can be removed if you are happy with tuples instead of lists.
I suggest something like this:
items = ['40/40', '10/40', '30/40', '4/5', '18/40', '40/40', '76/80', '10/10']
items_1 = list()
items_2 = list()
for item in items:
i_1, i_2 = item.split("/") #Split the item into the two parts
items_1.append(i_1)
items_2.append(i_2)
Result (from the IDLE shell)
>>> print(items_1)
['40', '10', '30', '4', '18', '40', '76', '10']
>>> print(items_2)
['40', '40', '40', '5', '40', '40', '80', '10']
It works even when items is empty.
First split the elements of items (explained here), then zip them (explained here):
items = ['40/40', '10/40', '30/40', '4/5', '18/40', '40/40', '76/80', '10/10']
items_tuples = map(lambda x: x.split('/'), items)
items_1, items_2 = zip(*items_tuples)
But note that this will cause a ValueError if you ever call it when items is empty.
You can try these methods :
items = ['40/40', '10/40', '30/40', '4/5', '18/40', '40/40', '76/80', '10/10']
print(list(zip(*[i.split('/') for i in items])))
or
print(list(zip(*(map(lambda x:x.split('/'),items)))))
output:
[('40', '10', '30', '4', '18', '40', '76', '10'), ('40', '40', '40', '5', '40', '40', '80', '10')]
